- 论坛徽章:
- 8
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- [admin@mail ~]$ dig -t mx gmail.com
- ; <<>> DiG 9.3.4-P1 <<>> -t mx gmail.com
- ;; global options: printcmd
- ;; Got answer:
- ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37651
- ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 4
- ;; QUESTION SECTION:
- ;gmail.com. IN MX
- ;; ANSWER SECTION:
- gmail.com. 630 IN MX 30 alt3.gmail-smtp-in.l.google.com.
- gmail.com. 630 IN MX 40 alt4.gmail-smtp-in.l.google.com.
- gmail.com. 630 IN MX 5 gmail-smtp-in.l.google.com.
- gmail.com. 630 IN MX 10 alt1.gmail-smtp-in.l.google.com.
- gmail.com. 630 IN MX 20 alt2.gmail-smtp-in.l.google.com.
- ;; AUTHORITY SECTION:
- gmail.com. 79666 IN NS ns1.google.com.
- gmail.com. 79666 IN NS ns2.google.com.
- gmail.com. 79666 IN NS ns3.google.com.
- gmail.com. 79666 IN NS ns4.google.com.
- ;; ADDITIONAL SECTION:
- ns1.google.com. 79156 IN A 216.239.32.10
- ns2.google.com. 247496 IN A 216.239.34.10
- ns3.google.com. 247492 IN A 216.239.36.10
- ns4.google.com. 247500 IN A 216.239.38.10
- ;; Query time: 0 msec
- ;; SERVER: 127.0.0.1#53(127.0.0.1)
- ;; WHEN: Fri Feb 26 14:46:45 2010
- ;; MSG SIZE rcvd: 286
复制代码 从优先级上看所有的邮件都应该是优先从gmail-smtp-in.l.google.com走,但是每次查询mx记录,发现他的5条mx记录是轮训的 |
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